 On 30 September 1919, North Sea Aerial Navigation Co Ltd started a regular passenger service between Roundhay Park (Leeds) and Hounslow Heath.In 1920, the company was renamed North Sea Aerial & General Transport Co Ltd and services were extended to Amsterdam.On 21 November 1919, one Kangaroo (G-EAOW) took off from Hounslow Heath in an attempt to win the Australian government prize of £A10,000 for the first Australian airman to fly a British aircraft from the UK to Australia within thirty consecutive days.